I've been trying to gather some more data on this, and here's what I have so far... I added a config for eth0 in /etc/systemd/network so that the test (which replaces eth netplan config with wifi config temporarily) doesn't leave us without the ability to reconnect.
Testing with dawson-uc18-m7-20190122-10 and stock uc18 after a snap refresh with current pc-kernel, it seems to sometimes work, sometimes crash and I can never reconnect, and sometimes it boots back up and I can ssh in again (and see 0m uptime) Using the current stable image, I get the same behavior though... it's pretty random, so it's hard to say when this started happening: pc-kernel 4.15.0-151.157 805 18/stable canonical kernel Reverting the kernel to the one that was on the image for the dawson-uc18 image: pc-kernel 4.15.0-44.47 182 18/stable canonical kernel ...This one is very old, I know, but after about 50 attempts, I haven't been able to reproduce it with this kernel. Using the current stable kernel again, and reverting core18 to rev 1081 (which was on the image originally), I was somehow (maybe dumb luck?) about to still reproduce a problem, but it was in a state where I could still ssh to it. I could not run snap, ps, or almost anything else, but I could at least find this oops in dmesg: https://pastebin.canonical.com/p/jsctQmJZGc/ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1938269 Title: pc-kernel snap 4.15.0-152.159 (UC18) regression in network behaviour Status in linux package in Ubuntu: Confirmed Bug description: Several amd64 devices have shown an marked increase in failures to complete automated testing with this kernel snap that is currently on 18/beta channel. The devices tested are: dawson-j ==== device type: NUC7PJYH, NUC7CJYH processor: Pentium Silver J5005 1.50GHz, Celeron J4005 2.00GHz ethernet: Realtek 10ec:8168 wireless: Intel 8086:31dc dawson-i ==== device-type: NUC7i3DNHE, NUC7i5DNHE processor: i3-7100U 2.40GHz, i5-7300U 2.60GHz ethernet: Intel 8086:156f wireless: Intel 8086:24fd dearest-team ==== device-type: Inspiron 5758 processor: i5-5200U 2.20GHz ethernet: Realtek 10ec:8136 wireless: Intel 8086:08b3 Symptoms shown by these devices are not the controller side that manages the test run loses connection with the device while carrying out WiFi connection tests. The failure rate does not appear to be 100%, there have been some runs that have completed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1938269/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
